A 2μm band laser ignition device and ignition method

A laser ignition and laser technology, applied in the laser field, can solve the problems of the ignition laser system volume, power consumption burden, restricting the application of LIPI engineering, etc., and achieve the effect of improving the ignition success rate, reducing high requirements, and reducing energy waste.
CN109736993BActive Publication Date: 2021-01-05HARBIN ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN ENG UNIV
Publication Date
2021-01-05

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Abstract

The invention discloses a 2 micrometer-waveband laser ignition device and method, and belongs to the technical field of laser. The ignition method comprises two stages, and at the first stage, a Ho:YAG laser of the waveband through self help, and fuel is preheated; at the second stage, a stable and high-energy 1064 nm laser is adopted for ignition. A preheating device comprises a heating part anda detecting part. According to the detecting part, a high-brightness LED lamp, a convex lens, a concave lens, a diaphragm and a plane mirror are used for setting up an imaging system, by means of an experimental combustion sealed chamber and a high-speed CMOS, the heat distribution condition of vapor at the preheating stage is recorded through a schlieren method, and the temperature of fuel is monitored through an infrared thermometer. According to the heating part, the Ho:YAG laser is firstly used for focusing two laser beams at the output end through the concave lens and the convex lens, fuel is preheated on the waist thinning portion, and after the monitoring temperature is reached, ignition is carried out through the high-power Nd:YAG of 1064 nm. The success rate of ignition is greatlyincreased, meanwhile, the minimum ignition energy is reduced, and engine ignition at a lean-burn state is achieved.
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Description

technical field

[0001] The invention belongs to the technical field of lasers, and in particular relates to a 2 μm band laser ignition device and an ignition method. Background technique

[0002] Combustion is an important source of energy and power required for human production and life. With the acceleration of the industrialization process, the available reserves of non-renewable energy such as coal, oil, and natural gas have decreased sharply, and by-products such as greenhouse gases, nitrogen oxides, and particulate matter produced by combustion have also caused serious disasters such as the greenhouse effect, ozone hole, and acid rain. Environmental problems have seriously affected the earth's environment and human life. Therefore, how to improve the combustion efficiency of the combustion system and reduce the emission of pollutants has become an important topic in the field of combustion science.

[0003] Studies have shown that the temperature of the lean-burn rea...

Claims

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